/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package objectRank;

import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author Reza
 */
@WebServlet(name="ClickServlet", urlPatterns={"/ClickServlet"})
public class ClickServlet extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        GraphBean gb = new GraphBean();
        
        String query = request.getParameter("query");
        String document = request.getParameter("document");
        gb.documentClicked(query, document);
        System.out.println("click is added to graph.");
        try {
            gb.file1.delete(); // Delete the file to write the updated QueryObject again
            //gb.file1.createNewFile();
            gb.objectOut = new ObjectOutputStream(new BufferedOutputStream(
                        new FileOutputStream(gb.file1)));
            gb.objectOut.writeObject(gb.queryGraph);
            gb.objectOut.close(); // Close the output stream
        }catch(IOException e) {
            e.printStackTrace(System.err);
            System.exit(1);
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
